Grosse Ile Municipal Airport

ONZ · KONZ · Detroit/Grosse Ile, MI · 591 ft elevation · var 7W · Towered

Overview Weather Runways Comms & NavAids Charts Services & info

Airport information

ICAO / IATA: KONZ
Coordinates: 42.0991, -83.1615
Elevation: 591 ft MSL
Magnetic variation: 7W
Sectional chart: DETROIT
Airport use: Public
Control tower: Yes
ARTCC: CLEVELAND (ZOB)
Flight service (FSS): LANSING
NOTAM facility: ONZ
Attendance: MON-FRI 0800-1800; SAT-SUN PRIOR ARNGMT
Beacon: white-green (SS-SR)
Segmented circle: Yes
Wind indicator: lighted
Activated: 1941/05
Distance from city: 2 S

Weather

METAR observed

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TAF forecast

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Sun & FAA night 2026-06-20

Event	Local (EDT)	UTC
Morning civil twilight Loggable night ends	05:22 AM	09:22Z
Sunrise	05:57 AM	09:57Z
Sunset	09:12 PM	01:12Z
Evening civil twilight Loggable night begins	09:46 PM	01:46Z

Loggable night (§1.1)

09:46 PM → 05:22 AM

Night currency (§61.57)

10:12 PM → 04:57 AM

Plan a flight from KONZ

Destination (ICAO)

TAS (kt)Burn (gph)Reserve (hr)Wind from (°)Wind (kt)

Runway 04/22

4,846 ft × 100 ft · Asphalt (Good)

Edge lights: Med. Weight bearing: Single wheel 66k, Double wheel 83k, Dual tandem 105k.

Heading: 037° mag · 30° true
Markings: nonprecision
VGSI: 4-light PAPI (left) (3.04°)
Traffic pattern: Right

Heading: 217° mag · 210° true
Markings: nonprecision
VGSI: 4-light PAPI (left) (3.04°)
Traffic pattern: Left
Displaced threshold: 428 ft

Runway 17/35

4,424 ft × 75 ft · Concrete (Poor)

Edge lights: Med. Weight bearing: Single wheel 40k, Double wheel 55k, Dual tandem 90k.

Heading: 174° mag · 167° true
Markings: basic
VGSI: 4-light PAPI (left) (3°)
Traffic pattern: Left
Displaced threshold: 672 ft

Heading: 354° mag · 347° true
Markings: basic
VGSI: 4-light PAPI (left) (3°)
Traffic pattern: Right

Communication frequencies

Service	Frequency	Notes
APP	134.3	DETROIT APP
AWOS	119.675	AWOS 3
DEP	134.3	DETROIT DEP
RDO	115.7	LANSING RDO
UNIC	123	CTAF/UNICOM

Nearby navigation aids

NavAid	Type	Freq	Radial / Dist magnetic
DXO · Detroit	VOR-DME	113.40	r133° / 11.4 NM
CRL · Carleton	VORTAC	115.70	r080° / 13.5 NM
SVM · Salem	VORTAC	114.30	r137° / 26.8 NM
MTC · Selfridge	TACAN	133.70	r211° / 34.1 NM
PSI · Pontiac	VORTAC	111.00	r158° / 39.7 NM

Approaches

Departures

Arrivals

Minimums & Hot Spots

Chart Supplement FAA A/FD

Open PDF ↗

Preview Chart Supplement

VFR sectional

Open KONZ on the VFR sectional (SkyVector) ↗

Services

Fuel available: 100LL, Jet A
Bottled oxygen: NONE
Bulk oxygen: NONE
Airframe service: MAJOR
Powerplant service: MAJOR
Parking: tiedowns, hangars
Other services: Charter, Instruction, Rental

Ownership & management

Owner

TOWNSHIP OF GROSSE ILE

PO BOX 129, PO BOX 129, GROSSE ILE, MI

734-675-0155

Manager

JANEL MACNEE

P.O. BOX 129, PO BOX 129, GROSSE ILE, MI

734-675-0155

Remarks FAA

ARPT CLSD TO ACR OPS GTR THAN 30 PAX SEATS EXC PPR CALL AMGR.
BIRDS & DEER ON & INVOF ARPT.
ULTRALIGHT & PWRD PRCHT ACT INVOF ARPT.
FOR CD CTC DETROIT APCH AT 734-955-1404.
ACTVT REIL RWY 04 & 22; PAPI RWY 04, 22, 17, & 35; MIRL RWY 04/22 & 17/35 - CTAF.
APCH RATIO 20:1 TO DTHR.
EXTSV PEELING & CRACKING - FOD HAZ.

Nearby airports

MI53 · Mills FieldPrivate (7 NM)78MI · Carls AirportPrivate (7 NM)99MI · Newport Meadows Airport (9 NM)9MI2 · Newport Woods AirportPrivate (9 NM)W87 · Wickenheiser Airport (11 NM)KDTW · Detroit Metropolitan Wayne County Airport (11 NM)

Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open KONZ in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator.